Putative Late Ordovician land plants

Salamon, Mariusz A.; Gerrienne, Philippe; Steemans, Philippe; Gorzelak, Przemysław; Filipiak, Paweł; Hérissé, Alain Le; Paris, Florentin; Cascales‐Miñana, Borja; Brachaniec, Tomasz; Misz‐Kennan, Magdalena; Niedźwiedzki, Robert; Trela, Wiesław

doi:10.1111/nph.15091

Cited by 65 publications

(33 citation statements)

References 36 publications

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“…It is not certain that the sporangia spent a significant time out of water but they were nevertheless presumably capable of releasing their cryptospores into the air. A little younger stratigraphically are short, slender axes from the Hirnantian of Poland (c. 445 Ma), some of which appear to have terminal sporangia (Salamon et al, 2018). These small Polish fossils are poorly preserved but show a striking morphological similarity to the remains of polysporangiate ('cooksonioid') plants that occur in the Silurian.…”

Section: Mesofossil Evidence For Earliest (Ordovician) Land Plantsmentioning

confidence: 99%

Revisiting the Great Ordovician Diversification of land plants: Recent data and perspectives

Servais

Cascales‐Miñana

Cleal

et al. 2019

Palaeogeography, Palaeoclimatology, Palaeoecology

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Recent molecular clock data suggest with highest probability a Cambrian origin of Embryophyta (also called land plants), indicating that their terrestrialization most probably started about million years ago. The fossil record of the 'Cambrian explosion' was limited to marine organisms and not visible in the plant fossil record. The most significant changes in early land plant evolution occurred during the Ordovician. For instance, the earliest bryophytelike cryptospores and the oldest fragments of the earliest land plants come from the Middle and Late Ordovician, respectively. Organic geochemistry studies on biomarker compositions hint at a transition from green algae to land plants during the 'Great Ordovician Biodiversification Event' (GOBE). The colonization of the terrestrial realms by land plants clearly had an impact on marine ecosystems. Interactions between the terrestrial and marine biospheres have been proposed and the radiation of land plants potentially impacted on CO2 and O2 concentrations and on global climate. In addition, the shift of strontium isotopes during the Ordovician is probably linked to changing terrestrial landscapes, affected by the first massive land invasion of eukaryotic terrestrial life. The land plants seem unaffected by the first global mass extinction at the end of the Ordovician that eliminated many marine invertebrate taxa.

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Section: Mesofossil Evidence For Earliest (Ordovician) Land Plantsmentioning

confidence: 99%

Revisiting the Great Ordovician Diversification of land plants: Recent data and perspectives

Servais

Cascales‐Miñana

Cleal

et al. 2019

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…Vascular plants initially evolved in the Late Ordovician, but macrofossils of unequivocal vascular plants are rare until the later Silurian (e.g. Kenrick & Crane, ; Steemans et al, ; Salamon et al , ). Their increased abundance through the Silurian correlates with a marked decrease of the sheet‐braided style fluvial architecture, characterized by relatively thin and wide sediment bodies interpreted as channels much shallower and wider than the latter dominant meandering and braided streams (Cotter, ; Long, ; Fuller, ; Davies & Gibling, ; Davies et al, ; Bridgland, Bennett, McVicar‐Wright, & Scrivener, , but see Santos, Almeida, Godinho, Marconato, & Mountney, , Ielpi & Rainbird, , Ielpi, and Ganti, Whittaker, Lamb, & Fischer, for alternative views).…”

Section: Introductionmentioning

confidence: 99%

Variability of fluvial architecture in a poorly vegetated Earth: Silurian sheet‐braided and meandering ancestor river deposits recorded in northeastern Brazil

et al. 2019

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Rivers with little to no influence of vegetation and their implications for the architecture of Early Paleozoic and Precambrian fluvial deposits are an important topic of investigation for both clastic sedimentology and Earth System evolution perspectives. Despite the long-held concept of a dominant style of wide, shallow sheet-braided sandy channels, growing evidence for a great variability of architectural elements in pre-vegetation settings point to the predictable occurrence of other fluvial styles, which are possibly related to areas of low-slope alluvial plains. The present work brings sedimentological descriptions and fluvial style interpretations of Silurian fluvial successions of the Serra Grande Group in northeastern Brazil, developed in a glaciated basin margin (therefore with little to no effect of vegetation). The comparison of the resulting channel body architectures integrated to paleocurrent data and a diffusion-based numerical model enabled the evaluation of the controls on fluvial architecture variability in unvegetated alluvial plains. K E Y W O R D S bar surface orientation, clinoform modelling, Early Paleozoic rivers, meandering ancestors, paleocurrents

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“…No fossil evidence confirms such intervals, but a series of small fossil plant remains have been recently discovered from the uppermost Ordovician (Salamon et al . ). No unequivocal evidence of tracheophytes is known before Silurian times.…”

Section: Resultsmentioning

confidence: 97%

“…There is an important 'time gap' between the earliest evidence for land plants, provided by the mid-Ordovician dispersed spore fossil record (Rubinstein et al 2010 . No fossil evidence confirms such intervals, but a series of small fossil plant remains have been recently discovered from the uppermost Ordovician (Salamon et al 2018). No unequivocal evidence of tracheophytes is known before Silurian times.…”

Section: Resultsmentioning

confidence: 99%

An alternative model for the earliest evolution of vascular plants

Cascales‐Miñana

Steemans

Servais

et al. 2019

LET

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Land plants comprise the bryophytes and the polysporangiophytes. All extant polysporangiophytes are vascular plants (tracheophytes), but to date, some basalmost polysporangiophytes (also called protracheophytes) are considered non‐vascular. Protracheophytes include the Horneophytopsida and Aglaophyton/Teruelia. They are most generally considered phylogenetically intermediate between bryophytes and vascular plants and are therefore essential to elucidate the origins of current vascular floras. Here, we propose an alternative evolutionary framework for the earliest tracheophytes. The supporting evidence comes from the study of the Rhynie chert historical slides from the Natural History Museum of Lille (France). From this, we emphasize that Horneophyton has a particular type of tracheid characterized by narrow, irregular, annular and/or, possibly spiral wall thickenings of putative secondary origin, and hence that it cannot be considered non‐vascular anymore. Accordingly, our phylogenetic analysis resolves Horneophyton and allies (i.e. Horneophytopsida) within tracheophytes, but as sister to eutracheophytes (i.e. extant vascular plants). Together, horneophytes and eutracheophytes form a new clade called herein supereutracheophytes. The thin, irregular, annular to helical thickenings of Horneophyton clearly point to a sequential acquisition of the characters of water‐conducting cells. Because of their simple conducting cells and morphology, the horneophytophytes may be seen as the precursors of all extant vascular plant biodiversity.

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Putative Late Ordovician land plants

Cited by 65 publications

References 36 publications

Revisiting the Great Ordovician Diversification of land plants: Recent data and perspectives

Revisiting the Great Ordovician Diversification of land plants: Recent data and perspectives

Variability of fluvial architecture in a poorly vegetated Earth: Silurian sheet‐braided and meandering ancestor river deposits recorded in northeastern Brazil

An alternative model for the earliest evolution of vascular plants

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